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1979 924 Daily driven project
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DZGunner  



Joined: 18 Nov 2014
Posts: 172
Location: Great white north

PostPosted: Sun Mar 29, 2020 2:39 pm    Post subject: Reply with quote

So I'm at the point of needing to remove the pilot bearing in the crank, and I've been reading how to remove it for a while now but I don't really understand a few of the methods. Someone suggested packing grease in the back of the hole and inserting something the same diameter as the hole to make an airtight seal, then whacking said object with a hammer to force it out. Problem is... who the hell has something the exact same size as that hole... Open to suggestions. Thank you.


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Paul  



Joined: 02 Nov 2002
Posts: 9451
Location: Southeast Wisconsin

PostPosted: Mon Mar 30, 2020 4:27 am    Post subject: Reply with quote

I use a clutch alignment tool.

I would replace that rear main seal.
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.
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DZGunner  



Joined: 18 Nov 2014
Posts: 172
Location: Great white north

PostPosted: Mon Mar 30, 2020 6:07 am    Post subject: Reply with quote

I have a rear main coming in the mail . Also did you try the grease and hammer method; did it work for you?
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Paul  



Joined: 02 Nov 2002
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Location: Southeast Wisconsin

PostPosted: Mon Mar 30, 2020 8:10 am    Post subject: Reply with quote

Yes many times over many decades including other makes of cars.
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.


Last edited by Paul on Mon Mar 30, 2020 12:15 pm; edited 1 time in total
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Paul  



Joined: 02 Nov 2002
Posts: 9451
Location: Southeast Wisconsin

PostPosted: Mon Mar 30, 2020 8:16 am    Post subject: Reply with quote

This guy uses bread!

https://www.youtube.com/watch?v=00OlG5E8vLk
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.
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DZGunner  



Joined: 18 Nov 2014
Posts: 172
Location: Great white north

PostPosted: Mon Mar 30, 2020 11:09 am    Post subject: Reply with quote

So I tried the grease, and I used another clutch alignment tool that was from a different project with no success. I also read that the back of the insert is threaded, so I made my own sort of jig that was supposed to extract the insert the more you turned the center bolt. It started bending my jig, and when I supported it better, I actually got scared and just backed off because for a moment I thought I may have stripped the threads... Guess I'm trying bread...
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Paul  



Joined: 02 Nov 2002
Posts: 9451
Location: Southeast Wisconsin

PostPosted: Mon Mar 30, 2020 11:29 am    Post subject: Reply with quote

http://www.924board.org/viewtopic.php?t=32178&postdays=0&postorder=asc&start=15
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.
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DZGunner  



Joined: 18 Nov 2014
Posts: 172
Location: Great white north

PostPosted: Mon Mar 30, 2020 1:32 pm    Post subject: Reply with quote

I got it figured out. It uses the grease/bread/play-dough with the threaded bolt. I had to pack the play-dough behind the threads and then screwed a bolt in to get it to press it out. After fiddling with punches and hammers, i realized the thread had to be there for something, because there is no way you can get a punch to seal with the exposed bearing in there. I'll post pictures tomorrow. Thank you for the pointers Paul, it really did help.
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DZGunner  



Joined: 18 Nov 2014
Posts: 172
Location: Great white north

PostPosted: Tue Mar 31, 2020 12:28 pm    Post subject: Reply with quote

So here are some pictures to illustrate how it worked out. It actually came out incredibly easy this way. No hammering or anything destructive. I simply put play-dough back behind the threaded part at the end of the pilot bearing insert and threaded an M12x1.5 bolt into the threads of the insert, which is very similar to the hammer method. Just turn the bolt in, take it out and pack more material in, and keep repeating until it just slides out.

Also you can see in the picture the seal came out at the front of the insert. This happened when I was trying to hammer the thing out. If I wasn't replacing it anyways, this could have been saved with the bolt method.




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DZGunner  



Joined: 18 Nov 2014
Posts: 172
Location: Great white north

PostPosted: Tue Mar 31, 2020 12:35 pm    Post subject: Reply with quote

Another small update: CV axles are painted and ready for grease. I'm still trying to find an end cap. The ones I ordered were 128 mm, and the ones on our cars are 100mm. The only 100mm end caps I could find were on http://race.parts/Catalogue/Drivetrain/CV-Joints/End-Caps/GKN-CV-Joint-End-Caps , but its foreign and unsecured so I'm not sure if I trust putting my information in to them. If anyone can vouch for this website being trust worthy, I'll buy one to test fit. Contacted EMPI for a possible end cap, waiting for a reply.



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safe  



Joined: 18 Mar 2017
Posts: 175
Location: Sweden

PostPosted: Tue Mar 31, 2020 4:07 pm    Post subject: Reply with quote

Not only do they need to be 100mm, they need to fit inside the flanges.

Im not seeing them in the pictures, do you have the halv moon washers that goes under the bolts?
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DZGunner  



Joined: 18 Nov 2014
Posts: 172
Location: Great white north

PostPosted: Wed Apr 01, 2020 5:01 am    Post subject: Reply with quote

You talking about these?


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safe  



Joined: 18 Mar 2017
Posts: 175
Location: Sweden

PostPosted: Wed Apr 01, 2020 6:37 am    Post subject: Reply with quote

Yes, those 😁
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MikeJinCO  



Joined: 08 Jun 2010
Posts: 936
Location: Maysville, Colorado

PostPosted: Wed Apr 01, 2020 7:36 am    Post subject: Reply with quote

The pilot bearing is a SKF BK 1012. 14mm od, 10mm ID it is the same as on a Ford Mustang 2 and available at any auto parts store.
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Poco a Poco, #033 '78 Vintage racer, SCCA Dp-81
'77 924
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MikeJinCO  



Joined: 08 Jun 2010
Posts: 936
Location: Maysville, Colorado

PostPosted: Wed Apr 01, 2020 7:40 am    Post subject: Reply with quote

The pilot bearing is an SKF BK1012, 14mm od, 10mm id same as for a Ford Mustang II and available at any FLAPS
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Mike
Poco a Poco, #033 '78 Vintage racer, SCCA Dp-81
'77 924
cricketdesigns.com
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